• Milestone

Proton elastic form factor ratios to Q2=3.5GeV2 by polarization transfer

V. Punjabi et al. (Jefferson Lab Hall A Collaboration)
Phys. Rev. C 71, 055202 – Published 20 May 2005
An article within the collection: Physical Review C 50th Anniversary Milestones

Abstract

The ratio of the proton elastic electromagnetic form factors, GEp/GMp, was obtained by measuring Pt and P, the transverse and longitudinal recoil proton polarization components, respectively, for the elastic epepreaction in the four-momentum transfer squared range of 0.5 to 3.5GeV2. In the single-photon exchange approximation, GEp/GMp is directly proportional to Pt/P. The simultaneous measurement of Pt and P in a polarimeter reduces systematic uncertainties. The results for GEp/GMp show a systematic decrease with increasing Q2, indicating for the first time a definite difference in the distribution of charge and magnetization in the proton. The data have been reanalyzed and their systematic uncertainties have become significantly smaller than those reported previously.

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  • Received 12 January 2005
  • Publisher error corrected 8 June 2005

DOI:https://doi.org/10.1103/PhysRevC.71.055202

©2005 American Physical Society

Corrections

8 June 2005

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Physical Review C 50th Anniversary Milestones

This collection of milestone papers from PRC highlights research that remains central to current developments in nuclear physics.

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Vol. 71, Iss. 5 — May 2005

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